SSE2 implementation of S32A_D565_Opaque
microbenchmark of S32A_D565_Opaque() shows a 3x speedup after SSE optimization with various count on i7-3770.
BUG=
R=mtklein@google.com, reed@google.com
Author: qiankun.miao@intel.com
Review URL: https://codereview.chromium.org/138163013
git-svn-id: http://skia.googlecode.com/svn/trunk@13495 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/opts/SkBlitRow_opts_SSE2.cpp b/src/opts/SkBlitRow_opts_SSE2.cpp
index f3d010e..47651c4 100644
--- a/src/opts/SkBlitRow_opts_SSE2.cpp
+++ b/src/opts/SkBlitRow_opts_SSE2.cpp
@@ -9,6 +9,7 @@
#include "SkBlitRow_opts_SSE2.h"
#include "SkBitmapProcState_opts_SSE2.h"
#include "SkColorPriv.h"
+#include "SkColor_opts_SSE2.h"
#include "SkUtils.h"
#include <emmintrin.h>
@@ -851,3 +852,125 @@
width--;
}
}
+
+/* SSE2 version of S32A_D565_Opaque()
+ * portable version is in core/SkBlitRow_D16.cpp
+ */
+void S32A_D565_Opaque_SSE2(uint16_t* SK_RESTRICT dst,
+ const SkPMColor* SK_RESTRICT src,
+ int count, U8CPU alpha, int /*x*/, int /*y*/) {
+ SkASSERT(255 == alpha);
+
+ if (count <= 0) {
+ return;
+ }
+
+ if (count >= 8) {
+ // Make dst 16 bytes alignment
+ while (((size_t)dst & 0x0F) != 0) {
+ SkPMColor c = *src++;
+ if (c) {
+ *dst = SkSrcOver32To16(c, *dst);
+ }
+ dst += 1;
+ count--;
+ }
+
+ const __m128i* s = reinterpret_cast<const __m128i*>(src);
+ __m128i* d = reinterpret_cast<__m128i*>(dst);
+ __m128i var255 = _mm_set1_epi16(255);
+ __m128i r16_mask = _mm_set1_epi16(SK_R16_MASK);
+ __m128i g16_mask = _mm_set1_epi16(SK_G16_MASK);
+ __m128i b16_mask = _mm_set1_epi16(SK_B16_MASK);
+
+ while (count >= 8) {
+ // Load 8 pixels of src.
+ __m128i src_pixel1 = _mm_loadu_si128(s++);
+ __m128i src_pixel2 = _mm_loadu_si128(s++);
+
+ // Check whether src pixels are equal to 0 and get the highest bit
+ // of each byte of result, if src pixels are all zero, src_cmp1 and
+ // src_cmp2 will be 0xFFFF.
+ int src_cmp1 = _mm_movemask_epi8(_mm_cmpeq_epi16(src_pixel1,
+ _mm_setzero_si128()));
+ int src_cmp2 = _mm_movemask_epi8(_mm_cmpeq_epi16(src_pixel2,
+ _mm_setzero_si128()));
+ if (src_cmp1 == 0xFFFF && src_cmp2 == 0xFFFF) {
+ d++;
+ count -= 8;
+ continue;
+ }
+
+ // Load 8 pixels of dst.
+ __m128i dst_pixel = _mm_load_si128(d);
+
+ // Extract A from src.
+ __m128i sa1 = _mm_slli_epi32(src_pixel1,(24 - SK_A32_SHIFT));
+ sa1 = _mm_srli_epi32(sa1, 24);
+ __m128i sa2 = _mm_slli_epi32(src_pixel2,(24 - SK_A32_SHIFT));
+ sa2 = _mm_srli_epi32(sa2, 24);
+ __m128i sa = _mm_packs_epi32(sa1, sa2);
+
+ // Extract R from src.
+ __m128i sr1 = _mm_slli_epi32(src_pixel1,(24 - SK_R32_SHIFT));
+ sr1 = _mm_srli_epi32(sr1, 24);
+ __m128i sr2 = _mm_slli_epi32(src_pixel2,(24 - SK_R32_SHIFT));
+ sr2 = _mm_srli_epi32(sr2, 24);
+ __m128i sr = _mm_packs_epi32(sr1, sr2);
+
+ // Extract G from src.
+ __m128i sg1 = _mm_slli_epi32(src_pixel1,(24 - SK_G32_SHIFT));
+ sg1 = _mm_srli_epi32(sg1, 24);
+ __m128i sg2 = _mm_slli_epi32(src_pixel2,(24 - SK_G32_SHIFT));
+ sg2 = _mm_srli_epi32(sg2, 24);
+ __m128i sg = _mm_packs_epi32(sg1, sg2);
+
+ // Extract B from src.
+ __m128i sb1 = _mm_slli_epi32(src_pixel1,(24 - SK_B32_SHIFT));
+ sb1 = _mm_srli_epi32(sb1, 24);
+ __m128i sb2 = _mm_slli_epi32(src_pixel2,(24 - SK_B32_SHIFT));
+ sb2 = _mm_srli_epi32(sb2, 24);
+ __m128i sb = _mm_packs_epi32(sb1, sb2);
+
+ // Extract R G B from dst.
+ __m128i dr = _mm_srli_epi16(dst_pixel,SK_R16_SHIFT);
+ dr = _mm_and_si128(dr, r16_mask);
+ __m128i dg = _mm_srli_epi16(dst_pixel,SK_G16_SHIFT);
+ dg = _mm_and_si128(dg, g16_mask);
+ __m128i db = _mm_srli_epi16(dst_pixel,SK_B16_SHIFT);
+ db = _mm_and_si128(db, b16_mask);
+
+ __m128i isa = _mm_sub_epi16(var255, sa); // 255 -sa
+
+ // Calculate R G B of result.
+ // Original algorithm is in SkSrcOver32To16().
+ dr = _mm_add_epi16(sr, SkMul16ShiftRound_SSE(dr, isa, SK_R16_BITS));
+ dr = _mm_srli_epi16(dr, 8 - SK_R16_BITS);
+ dg = _mm_add_epi16(sg, SkMul16ShiftRound_SSE(dg, isa, SK_G16_BITS));
+ dg = _mm_srli_epi16(dg, 8 - SK_G16_BITS);
+ db = _mm_add_epi16(sb, SkMul16ShiftRound_SSE(db, isa, SK_B16_BITS));
+ db = _mm_srli_epi16(db, 8 - SK_B16_BITS);
+
+ // Pack R G B into 16-bit color.
+ __m128i d_pixel = SkPackRGB16_SSE(dr, dg, db);
+
+ // Store 8 16-bit colors in dst.
+ _mm_store_si128(d++, d_pixel);
+ count -= 8;
+ }
+
+ src = reinterpret_cast<const SkPMColor*>(s);
+ dst = reinterpret_cast<uint16_t*>(d);
+ }
+
+ if (count > 0) {
+ do {
+ SkPMColor c = *src++;
+ SkPMColorAssert(c);
+ if (c) {
+ *dst = SkSrcOver32To16(c, *dst);
+ }
+ dst += 1;
+ } while (--count != 0);
+ }
+}
diff --git a/src/opts/SkBlitRow_opts_SSE2.h b/src/opts/SkBlitRow_opts_SSE2.h
index b443ec7..66bc95a 100644
--- a/src/opts/SkBlitRow_opts_SSE2.h
+++ b/src/opts/SkBlitRow_opts_SSE2.h
@@ -28,3 +28,7 @@
SkColor color, int width, SkPMColor);
void SkBlitLCD16OpaqueRow_SSE2(SkPMColor dst[], const uint16_t src[],
SkColor color, int width, SkPMColor opaqueDst);
+
+void S32A_D565_Opaque_SSE2(uint16_t* SK_RESTRICT dst,
+ const SkPMColor* SK_RESTRICT src,
+ int count, U8CPU alpha, int /*x*/, int /*y*/);
diff --git a/src/opts/SkColor_opts_SSE2.h b/src/opts/SkColor_opts_SSE2.h
new file mode 100644
index 0000000..13a5be5
--- /dev/null
+++ b/src/opts/SkColor_opts_SSE2.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2014 The Android Open Source Project
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkColor_opts_SSE2_DEFINED
+#define SkColor_opts_SSE2_DEFINED
+
+#include <emmintrin.h>
+
+static inline __m128i SkMul16ShiftRound_SSE(__m128i a, __m128i b, int shift) {
+ __m128i prod = _mm_mullo_epi16(a, b);
+ prod = _mm_add_epi16(prod, _mm_set1_epi16(1 << (shift - 1)));
+ prod = _mm_add_epi16(prod, _mm_srli_epi16(prod, shift));
+ prod = _mm_srli_epi16(prod, shift);
+
+ return prod;
+}
+
+static inline __m128i SkPackRGB16_SSE(__m128i r, __m128i g, __m128i b) {
+ r = _mm_slli_epi16(r, SK_R16_SHIFT);
+ g = _mm_slli_epi16(g, SK_G16_SHIFT);
+ b = _mm_slli_epi16(b, SK_B16_SHIFT);
+
+ __m128i c = _mm_or_si128(r, g);
+ return _mm_or_si128(c, b);
+}
+
+#endif//SkColor_opts_SSE2_DEFINED
diff --git a/src/opts/opts_check_SSE2.cpp b/src/opts/opts_check_SSE2.cpp
index d0d88fe..cc5adf1 100644
--- a/src/opts/opts_check_SSE2.cpp
+++ b/src/opts/opts_check_SSE2.cpp
@@ -165,6 +165,17 @@
}
}
+static SkBlitRow::Proc platform_16_procs[] = {
+ NULL, // S32_D565_Opaque
+ NULL, // S32_D565_Blend
+ S32A_D565_Opaque_SSE2, // S32A_D565_Opaque
+ NULL, // S32A_D565_Blend
+ NULL, // S32_D565_Opaque_Dither
+ NULL, // S32_D565_Blend_Dither
+ NULL, // S32A_D565_Opaque_Dither
+ NULL, // S32A_D565_Blend_Dither
+};
+
static SkBlitRow::Proc32 platform_32_procs[] = {
NULL, // S32_Opaque,
S32_Blend_BlitRow32_SSE2, // S32_Blend,
@@ -173,7 +184,11 @@
};
SkBlitRow::Proc SkBlitRow::PlatformProcs565(unsigned flags) {
- return NULL;
+ if (cachedHasSSE2()) {
+ return platform_16_procs[flags];
+ } else {
+ return NULL;
+ }
}
SkBlitRow::ColorProc SkBlitRow::PlatformColorProc() {